CN1217954A - Coherent jet injector lance - Google Patents

Coherent jet injector lance Download PDF

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Publication number
CN1217954A
CN1217954A CN98122676A CN98122676A CN1217954A CN 1217954 A CN1217954 A CN 1217954A CN 98122676 A CN98122676 A CN 98122676A CN 98122676 A CN98122676 A CN 98122676A CN 1217954 A CN1217954 A CN 1217954A
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China
Prior art keywords
jet
gas
lining
coherent
lance
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Granted
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CN98122676A
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Chinese (zh)
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CN1116422C (en
Inventor
J·E·安德森
P·C·马苏尔
R·J·瑟利内斯
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Praxair Technology Inc
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Praxair Technology Inc
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5211—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace
    • C21C5/5217—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace equipped with burners or devices for injecting gas, i.e. oxygen, or pulverulent materials into the furnace
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4606—Lances or injectors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Gas Burners (AREA)
  • Nozzles (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Road Signs Or Road Markings (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Devices For Medical Bathing And Washing (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

A lance which may be used to establish a long coherent gas jet which includes a primary passageway having a converging/diverging nozzle, and two radially spaced secondary passageways for establishing a flame barrier, each of the passageways communicating with an injection space defined by a protective jacket.

Description

Coherent jet injector lance
The present invention relates generally to be used to produce the equipment of air-flow.The present invention is specially adapted to produce the air-flow in the liquid of introducing such as motlten metal, and this motlten metal will cause severe rugged environment to gas injection apparatus.
Setting up air-flow usually wishes.For example air-flow can be spurted in the liquid for one or more reasons.A kind of reacting gas can be spurted in a kind of liquid, so that react with one or more compositions of liquid, for example oxygen spray is gone in the molten iron so that react and make the iron decarburization and provide heat to molten iron with carbon in the molten iron.For the fusing purpose, oxygen can be spurted into for example copper, in other motlten metal of lead and zinc.Nonreactive gas such as inert gas can be spurted in the liquid, so that agitated liquid for example promotes better Temperature Distribution or promotes better component distributing in the whole liquid.
Liquid usually is contained in the container such as reactor or melting container, and wherein, liquid forms the pond that is fitted on container bottom and the certain-length sidewall and has top surface in container.When to the liquid cell gas jet, wish to make in the gas influent as much as possible, so that realize the purpose that gas sprays.Therefore, the liquid of gas under gas injection apparatus is spurted into liquid surface.If the nozzle of a common gas ejector is spaced apart with it above liquid surface, the many gases that impinge upon so on the liquid surface will reflect and can not enter liquid cell at liquid surface.In addition, this effect can cause splashing of liquid, and this can cause the loss and the operation problem of material.
Though adopt gas injection apparatus that diapire or sidewall install with gas dive inject in the liquid very effective, but when liquid is that corrosive liquids or its temperature will produce operation problem when very high, because these conditions may cause the local loss of the rapid damage of gas injection apparatus and container lining material, cause the external refrigeration system and the frequent blowing out and the very high operating cost safeguarded of needs complexity.A kind of expedient method is with the top of gas injection apparatus or the nozzle surface near liquid cell, and avoids contacting with liquid surface, and with gas from gas injection apparatus with high velocity jet, so that the overwhelming majority of gas is fed in the liquid.Yet this expedient method still can not be satisfactory, because gas injection apparatus top and liquid surface are near still causing the badly damaged of this equipment.In addition, under liquid surface was not static situation, nozzle must be taken this translational surface into account and constantly move, and can take place and kept ideal distance between spray gun top and the pool surface at ideal position so that gas sprays.For the electric arc smelting furnace, this requires complicated hydraulic-driven spray gun controller, and it is that very expensive also requiring safeguarded widely.
Another expedient method is to adopt the pipe that stretches into by the liquid cell surface.For example the pipe of non-water-cooled usually is used for oxygen spray is gone in the molten steel pond in the electric arc smelting furnace.Yet this expedient method still can not be satisfactory, because the rapid loss of pipe requires to use complicated hydraulically powered pipe controller and pipe feed apparatus, so that the rapid proportion of goods damageds of compensation pipe.In addition, the loss of the pipe that must constantly change is that expense is very high.
If can set up a kind of coherent jet, then can address these problems.The condensed gas jet can be with its diameter and speed than permanent many of common gas jet maintenance after spraying.Utilize coherent jet, the injector top can be arranged greatly away from liquid surface, and still can make all gas in the condensed gas jet pass liquid surface basically.
In addition, coherent jet can be applied in other application scenario such as the burn application occasion of present employing gas jet.
Therefore, the purpose of this invention is to provide and a kind of gas is spurted into the equipment in the volume, make the gas that sprays to form a kind of gas jet of cohesion.
Those of ordinary skill in the art has read present disclosure later on open-and-shut above-mentioned can being reached by the present invention with other purpose, and the present invention is:
A kind of coherent jet injector lance, it comprises:
(A) injector assembly, it has:
(1) main thoroughfare, a jet space and a nozzle, this nozzle have an import that is connected with the main thoroughfare and an outlet that is connected with jet space;
(2) first secondary channels that radially separate with the main thoroughfare and be connected with jet space;
(3) second secondary channels that radially separate with first secondary channel and be connected with jet space;
(B) lining that is covered with the injector assembly, described lining extends through jet expansion and defines this jet space.
Fig. 1 is the cross-sectional view of a preferred embodiment of coherent jet injector lance of the present invention.
Fig. 2 is the cross-sectional view of another preferred embodiment of coherent jet injector lance of the present invention.
Fig. 3 is the simplification cross-sectional view of an embodiment that is placed on the coherent jet spray gun of the present invention of container side wall.
Fig. 4 is the simplification top view of an embodiment of coherent jet injector lance of the present invention, and the additional injection channel that it has in lining can spray and disperse jet.
Fig. 5 is the simplification top view of an embodiment of coherent jet injector lance of the present invention, and the additional injection channel that it has in lining can spray the convergence jet.
Piece mark identical in the accompanying drawing is identical.
Describe the present invention in detail referring now to accompanying drawing.Referring now to Fig. 1,, coherent jet injector 1 comprises an injector assembly and an outer liner.The injector assembly comprises a main thoroughfare 2 that is connected with a main gas source (not shown).Main gas can be the gas that any hope constitutes coherent jet.The example of this gas comprises oxygen, nitrogen, argon gas, hydrogen, helium, hydrocarbon gas fuel and comprise the mixture that they are two kinds or more of.Main thoroughfare 2 also is connected with nozzle 3.Preferably on the part of its length at least, nozzle 3 has one less than the diameter of main thoroughfare 2 with less than the diameter of the diameter of jet space 6.More best is that as shown in Figure 1, nozzle 3 is convergence/divergence nozzles.Convergence/divergence nozzle 3 has an import 4 that is connected with main thoroughfare 2 and an outlet 5 that is connected with jet space 6.
What radially separate with main thoroughfare 2 is first secondary channel 7, and what radially separate with first secondary channel 7 is second secondary channel 8.One of first and second secondary channels are connected with an oxidizer source (not shown), and in first and second secondary channels another is connected with a fuels sources (not shown).When oxygen was main gas, first secondary channel 7 preferably was connected with a fuels sources and second secondary channel 8 is connected with an oxidizer source.Preferably it contains at least 30 mol percentage oxygen to oxidant, the most preferably contains the fluid of at least 90 mol percentage oxygen.Oxidant can be the technical purity oxygen with oxygen concentration of 99.5 mol percentages or more mol percentages.Fuel can be such as methane, propane, butylene, natural gas, hydrogen, coke furnace gas, perhaps any fluid fuel of oil plant.
Each first and second secondary channel is connected with jet space 6, preferably, as shown in Figure 1, flushes with the outlet 5 of convergence/divergent nozzles 3.Fig. 1 shows a preferred embodiment of the present invention, and wherein, each first and second secondary channel becomes a plurality of independent passages, makes each first and second secondary channel be connected with jet space 6 around the ring in outlet many holes of 5 as one.Perhaps, one of first and second secondary channels or both are connected with jet space 6 as an annulus of outlet 5.
The injector assembly is covered by a lining 9, and this lining 9 extends and has a lining extension 10 that extends through jet expansion 5 and limit jet space 6 along the length of injector assembly.Lining extension 10 has one and generally is 12 inches and preferably in the length of inch in the scope O.5-7.Needn't there be equal length the lining extension around whole injector assembly, thereby its length in injector assembly one side can surpass its its length in the other side of injector assembly.Figure 2 illustrates such an embodiment.Such embodiment is particularly advantageous when the sidewall at container tilts installation.Lining 9 can be cooled off by the cooling agent such as water of circulation in cooling agent flow channel 11 and cooling agent flow pass 12.The jet space that is formed by lining extension 1O is that volume 6 is set up a protection zone, and this protection zone is used to protect the air-flow that has just flowed out main and secondary channel.This provides a conduction environment can improve its globality by the initial formation for coherent jet.
Usually, coherent jet injector lance of the present invention is arranged in such as on the wall of a container of smelting furnace or top and is used for and will spurts in the container as the air-flow of condensed gas jet.Fig. 3 shows a kind of such device, and wherein, coherent jet injector lance is mounted obliquely within on the sidewall 20 such as the container of electric arc smelting furnace, generally gas is spurted into the inside 25 of container.In Fig. 3, the injector assembly is represented by black rectangle body 22.
When work, main gas ejects from spray gun 1, forms the main air-flow that 100O foot/per second (fps) or more speed are arranged usually.Fuel and oxidant eject from spray gun 1, form annular stream, and they have just ejected from spray gun 1 and have just got started mixing and burning, form the flame envelope around main air-flow.If the present invention is used for the thermal environment such as the metal smelting furnace, do not need to be used for the independent incendiary source of fuel and oxidant.If the present invention is used for the environment that fuel and oxidant will be lighted a fire automatically, then the incendiary source such as spark lighter will need.Preferably, the speed of flame envelope is less than the speed of main air-flow and roughly in the scope of 50-1000 foot/per second.Flame envelope forms a fluid barriers around main air-flow.This barrier can significantly reduce by the amount of the environmental gas in the at a high speed main air-flow of carrying under one's arms, and therefore, can be used for later on main air-flow cohesion being kept a quite long distance at main air-flow from lance ejection.This just can make spray gun place like this, makes the spray gun top apart from main air impingement or contact other fluid or the solid part separates a bigger distance, therefore can improve the security of spray gun and keep its globality better.
Usually, the amount of fuel that provides from spray gun and oxidant for main air-flow ideal length just be enough to form an effective flame envelope.Yet wish that sometimes considerable fuel and oxidant come out from lance ejection, so that flame envelope not only is used to stop main air-flow to be carried under one's arms into environmental gas but also be used for providing sizable heat to container.That is to say that in certain embodiments of the present invention, spray gun also can play a part a burner.
The lining of coherent jet injector lance of the present invention can contain one or more additional channel, and being used for container that Xiang Xiangqi sprays the main gas jet of cohesion provides one or multiply additive fluid or provide one or the multiply solid particle flows.Figure 3 illustrates and have the additional channel 21 that sprays opening 24.One or more additional channel 21 can be advantageously used in coherent jet injector lance of the present invention; so that provide after-burning oxygen to the electric arc smelting furnace; be used for being implemented in the United States Patent (USP) 5572444 open and claimed post combustion methods of authorizing people such as Mathur, and the injector assembly is used for providing main oxygen to motlten metal.One or more additional channel can with one or multiply be parallel to cohesion main gas jet or with one or multiply towards or deviate from the jet that the main gas jet of cohesion tilts additive fluid or grain flow be provided.Fig. 4 shows one embodiment of the present of invention, and it can be used to provide two strands of additional air-flows of dispersing.And Fig. 5 shows one embodiment of the present of invention, and it can be used to provide two bursts of additional air flow from spray gun, makes these two strands of air-flows intersect in the downstream of spray gun, and promptly these two strands of air-flows are assembled.The imaginary line that axis passage or gas jet is by channel center or gas jet extend along its length.The axis of main thoroughfare is shown among Fig. 1.
Be the preferable standard of coherent jet injector lance design of the present invention below.
(1) flow by the main thoroughfare
Under rated temperature and pressure (NTP), average cubic feet/hour (MCFH) of 20-150
Supply pressure (nozzle upstream): 50-300 pound/inch 2(psig)
The throat diameter of convergence-divergent nozzles
D=K(Q/P) 1/2
D-throat diameter-inch
Q-cubic feet/hour (CFH), main gas flow under rated temperature and pressure
P-absolute pressure (psig)
K=0.03-0.04
D=1/4”-2”
(2) to the porous ring passage that centers on nozzle or the oxygen of circular passage
D eq=CQ 1/4
D Eq=be equivalent to the diameter of the pipe of porous ring or circular passage cross-sectional area
D EqThe square root of=[porous ring or circular passage cross-sectional area (square inch) are divided by (π/4)]
Q-cubic feet/hour (CFH) be main gas flow under rated temperature pressure
C-0.013-0.16
(3) to the porous ring that centers on nozzle or the fuel of circular passage
D eq=JQ 1/4/H 1/2
Q-CFH is main gas flow under rated temperature pressure
H-fuel value-British thermal unit (Btu)/cubic feet (BTU/CF), (under rated temperature pressure)
J=0.4-5.0
When employing is of the present invention, then can determine gas flow effectively now as the condensed gas jet.Though the present invention has done detailed description with reference to some preferred embodiment to the present invention, those of ordinary skill in the art knows in the spirit and scope of claim other embodiment to be arranged.

Claims (9)

1. coherent jet injector lance, it comprises:
(A) injector assembly, it has:
(1) main thoroughfare, a jet space and a nozzle, this nozzle have an import that is connected with the main thoroughfare and an outlet that is connected with jet space;
(2) first secondary channels that radially separate with the main thoroughfare and be connected with jet space;
(3) second secondary channels that radially separate with first secondary channel and be connected with jet space;
(B) lining that is covered with the injector assembly, described lining extends through jet expansion and defines this jet space.
2. coherent jet injector lance as claimed in claim 1 is characterized in that, nozzle is a convergence/divergence nozzle.
3. coherent jet injector lance as claimed in claim 1 is characterized in that, lining in a side of injector assembly than extending through bigger distance of jet expansion in its other side.
4. coherent jet injector lance as claimed in claim 1 is characterized in that it is installed on the sidewall of container.
5. coherent jet injector lance as claimed in claim 3 is characterized in that it is mounted obliquely within on the sidewall of container.
6. coherent jet injector lance as claimed in claim 1 is characterized in that lining comprises at least one additional channel, is used to provide the jet that comprises one of fluid at least or particle.
7. coherent jet injector lance as claimed in claim 6 is characterized in that, at least one additional channel in lining has an axis that tilts with the main thoroughfare.
8. coherent jet injector lance as claimed in claim 6 is characterized in that, it comprises at least two additional channels in lining, and it is directed to make the axis of the fluid jet that ejects from described additional channel intersect.
9. coherent jet injector lance as claimed in claim 6 is characterized in that, it comprises at least two additional channels in lining, and it is directed to make the axis of the fluid jet that ejects from described additional channel disperse.
CN98122676A 1997-11-20 1998-11-19 Coherent jet injector lance Expired - Fee Related CN1116422C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US975,154 1997-11-20
US08/975,154 US6096261A (en) 1997-11-20 1997-11-20 Coherent jet injector lance
US975154 1997-11-20

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CN1217954A true CN1217954A (en) 1999-06-02
CN1116422C CN1116422C (en) 2003-07-30

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US (1) US6096261A (en)
EP (1) EP0918093B1 (en)
JP (1) JPH11217620A (en)
KR (1) KR100395612B1 (en)
CN (1) CN1116422C (en)
AR (1) AR014399A1 (en)
AU (1) AU734537B2 (en)
BR (1) BR9804716A (en)
CA (1) CA2254473C (en)
DE (1) DE69812544T2 (en)
ES (1) ES2190034T3 (en)
ID (1) ID21710A (en)
MY (1) MY123393A (en)
PL (1) PL329788A1 (en)
PT (1) PT918093E (en)
RU (1) RU2192481C2 (en)
TW (1) TW482188U (en)

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CN1320129C (en) * 2002-04-24 2007-06-06 英国氧气集团有限公司 Lance for injecting particulate material into liquid metal
CN107470050A (en) * 2017-09-30 2017-12-15 江西远达环保有限公司 Has the desulphurization denitration spray gun of cooling effect

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US6142764A (en) * 1999-09-02 2000-11-07 Praxair Technology, Inc. Method for changing the length of a coherent jet
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Publication number Priority date Publication date Assignee Title
CN1320129C (en) * 2002-04-24 2007-06-06 英国氧气集团有限公司 Lance for injecting particulate material into liquid metal
CN107470050A (en) * 2017-09-30 2017-12-15 江西远达环保有限公司 Has the desulphurization denitration spray gun of cooling effect
CN107470050B (en) * 2017-09-30 2023-04-18 江西远达环保有限公司 Spray gun with cooling effect for desulfurization and denitrification

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AR014399A1 (en) 2001-02-28
PT918093E (en) 2003-06-30
CN1116422C (en) 2003-07-30
AU734537B2 (en) 2001-06-14
DE69812544T2 (en) 2003-11-13
US6096261A (en) 2000-08-01
CA2254473C (en) 2003-04-15
PL329788A1 (en) 1999-05-24
RU2192481C2 (en) 2002-11-10
ES2190034T3 (en) 2003-07-16
KR19990045403A (en) 1999-06-25
EP0918093A1 (en) 1999-05-26
JPH11217620A (en) 1999-08-10
KR100395612B1 (en) 2003-12-18
AU9325798A (en) 1999-06-10
CA2254473A1 (en) 1999-05-20
EP0918093B1 (en) 2003-03-26
ID21710A (en) 1999-07-15
MY123393A (en) 2006-05-31
BR9804716A (en) 1999-11-16
DE69812544D1 (en) 2003-04-30

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